航天器赋形反射面数传天线的可靠性评估

基于赋形反射面数传天线的功能和性能参数影响因素分析,确定了以赋形反射面数传天线的最大指向角增益作为可靠性特征量;提出了用在赋形反射面数传天线最大指向角的约束条件下,赋形反射面数传天线的最大指向角增益大于其下限指标的概率来表征赋形反射面数传天线可靠性的概念;提出了利用天线研制过程中多个技术状态相同的赋形反射面数传天线在相同的测试环境下采用相同测试方法获得的天线最大指向角增益测试数据,进行可靠性定量评估的方法。给出了X频段赋形反射面数传天线可靠性评估的示例,可靠性评估结果比可靠性预计结果更为客观,为航天器天线的可靠性验证提供了技术途径。

Reliability Assessment of Shaped-beam Data Transmission Antenna of Spacecraft

Based on analysis of factors which affect function and performance of the shaped-beam data transmission antenna, this paper selects the gain at maximum pointing angle as reliability characteristic parameter of the shaped-beam data transmission antenna. Reliability of the shaped- beam data transmission antenna is expressed or defined as the probability at which the gain at maximum pointing angle is greater than its lower limit index. A reliability assessment method is put forward, which applied gain measurement values at maximum direction angle of same shaped- beam data transmission antennas in the same measurement condition to reliability assessment. An application example of this reliability assessment method is given. The reliability assessment re- sult was more objective than reliability prediction result. The method provides a technical ap- proach to validate reliability of shaped-beam data transmission antenna.